screen resolution

[Aaron Konstam]

On Thu, 2012-02-09 at 15:15 -0800, Rick Stevens wrote: 
> On 02/09/2012 02:30 PM, Aaron Konstam wrote:
> > <snip>
> >>>> If you don't see your 1920x1080 in there, then you can forcing it by
> >>>> trying "xrandr --mode 1920x1080" to see if that'll bite.  If it does,
> >>>> then you can add appropriate lines to your xorg.conf file.
> >>> tried what yoou suggest. Although man xrandr says there is a --mode
> >>> option when I run xrandr --mode I get a response that the option does
> >>> not exist. Why is that?
> >>
> >> Ah, yes.  Try "xrandr --fb 1920x1080".  I think "--mode" was for a
> >> previous version of xrandr.  Did just "xrandr" show the ability to do
> >> 1920x1080?  I'm trying to see if your monitor or cable just isn't
> >> reporting the EDID info properly.
> > I am not the original poster but I was just trying this method to
> > configure my screen. In my case 1280x1024. When I ran:
> > xrandr --fb 1289x1024
> > I got the error message:
> > xrandr: Failed to get the size of gamma for output default.
> >
> > What does that mean?
> 
> I've been playing with this.  First off, do "xrandr" all by itself to
> find out what your outputs are called.  In my case, here's what I see:
> 
> [root at prophead ~]# xrandr
> Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
> DVI-I-1 connected 1920x1080+0+0 (normal left inverted right x axis y 
> axis) 598mm x 336mm
>     1920x1080      60.0*+   60.0
>     1600x1200      60.0
>     1680x1050      60.0
>     1280x1024      75.0     60.0
>     1440x900       59.9
>     1280x960       60.0
>     1152x864       75.0
>     1024x768       75.1     70.1     60.0
>     832x624        74.6
>     800x600        72.2     75.0     60.3     56.2
>     640x480        72.8     75.0     66.7     60.0
>     720x400        70.1
> DVI-I-2 disconnected (normal left inverted right x axis y axis)
> 
> So, I actually have two outputs, one called "DVI-I-1" (which is the
> active one and is currently in 1920x1080 mode) and "DVI-I-2" (which
> isn't hooked up to a monitor right now).  My active monitor can handle
> all the modes listed below it.  To change to 1600x1200 mode:
> 
> 	xrandr --output DVI-I-1 --mode 1600x1200
> 
> I just did this on my laptop (F16) to prove the concept and it did
> work.  The missing gamma thing is because you didn't specify an output,
> and the "--mode" does work, but only when "--output" is also specified.
> 
> I should read the man pages more thoroughly myself.  Sorry if I
> confused anyone.  You may now hurl angry birds at me if you wish.
> ----------------------------------------------------------------------
> - Rick Stevens, Systems Engineer, AllDigital    ricks at alldigital.com -
> - AIM/Skype: therps2        ICQ: 22643734            Yahoo: origrps2 -
> -                                                                    -
> -         Microsoft Windows:  Proof that P.T. Barnum was right       -
> ----------------------------------------------------------------------

That cleared thing up. Thanks!
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Aaron Konstam telephone: (210) 656-0355 e-mail: akonstam at sbcglobal.net